3595-1Q1 – 20 Channel Analogue Reed Relay IMP Replacement of 3595-1H IMP
No longer available. For information purposes only.
Description
The 3595-1Q1 is an enhanced version of the 3595-1C1, which includes 3 and 4 terminal resistance and RTD measurement facilities organised in a similar way to the original 3595-1H IMP. All 20 channels are available to use in pairs for the 3 and 4 wire measurement modes.
The channels of the 3595-1Q1 are fully programmable and so each 3 or 4 wire measurement takes up2 channels but leaves the rest available for other 3595-1C measurement modes are programmed using the same codes as a 3595-1H. The connector wiring for the 3 and 4 terminal resistance modes differs a little from the 3595-1H, but otherwise, the 3595-1Q is compatible with the measurement modes of the 3595-1H analogue channels.
Features
- Compatible Communications with 3595 series.
- Compatible enclosure and connector blocks.
- Thermocouple, resistance, RTD, voltage and current measurements in rugged enclosure.
- 20 Channels per Module – precision reed relay isolation. Individually programmable.
- Precision 3 and 4 wire resistance and RTD measurements. (3595-1Q1)
- Enhanced 14 to 19/20 bit resolution. 100 to 10 measurements per second.
- Enclosed connector blocks. Dual sensor accurate Cold Junction Compensation.
- Thermocouple health monitoring Temperatures in °C or °F unit.
Specifications
Number of channels / module: 20/10
Number of poles / channel: 3/6
Connector type input channels: Standard 3595 series, Isothermal Enclosure, Screw Terminals.
Current Measurement
Sensitivity ( 100R shunt fitted): <10nA
Accuracy as for voltage ranges + shunt accuracy.
A-D Converter
Measurement resolutions supported:
19/20 bits at 9 measurements/s
18/19 bits at 20 measurements/s
17 bits at 30 measurements/s
15 bits at 80 measurements/s
14 bits at 100 measurements/s
A number of bits includes a sign counted as 1 bit.
50 Hz Mains frequency interference rejection is provided by 17 and 20-bit modes 60 Hz mains interference rejection is provided by 17,19 and 20-bit modes.
Higher Measurement rates possible by disabling drift correct measurements.
Interference Rejection
AC 50/60Hz
Common mode rejection ratio channel group: <0.1uV/V
Single-channel common-mode rejection ratio: <1uV/V
Series mode rejection ratio 50 or 60 Hz +/- 0.05%: <1uv/V
Note: reed scanners are not suitable for direct connection to power circuits.
Voltage Measuring Mode
Input voltage ranges:
+12V>-12V
+2,0V >-2.0V
+200mV >-200mV
+30mV >-30mV
Automatic range selection is supported.
Temperature coefficients DC voltage: 25ppm rdg + 0.1uV/o C
Measurement sensitivity 30mV range 18 bits: <0.25uV
Additional error at 80 & 100/sec mode 0.03% of range.
Overload Protection
Channel overload protection: Passive 50V Continuous
Isolation
For protection against transients and ground loops.
Isolation test voltage IMP to IMP or to SNET: Tested at 500V
Power Requirement
Connector: Via SNET cable
Voltage: 11 to 48V
Current: <100mA at 12V, <50mA at 24V
Thermocouple Measurement Accuracy
Internal Cold junction compensation errors included: (External compensation is also available)
| Type | Range | Accuracy |
|---|---|---|
| K | -100 to 500 | 0.05°C |
| 500 to 1200 | 0.7 | |
| J | 1200 to 1600 | 3.0 |
| 360 to 800 | 0.5 | |
| T | -150 to 400 | 0.7 |
| R | 0 to 1600 | 0.5 |
| S | 0 to 1700 | 2.0 |
| E | -50 to 290 | 2.2 |
| 290 to 1000 | 0.7 | |
| B | 200 to 1600 | 1.0 |
| N | -200 to 1600 | 4.5 |
| -100 to 580 | 1.1.5 | |
| 80 to 1300 | 1.3 |
Displayed sensitivity: <0.1oC
Thermocouple Health Monitoring automatic by resistance measurement sequence.
Measurement modes: V DC (mV, DC, uVDC) Thermocouple CJC temperature, Sensor health.
Thermocouple types: K,J,T,R,S,E,B,N
Thermocouple compensation: Dual sensors
3595-1Q1 only: 3&4 wire resistance, 3&4 wire PT100.
Current Measurement
Sensitivity ( 100R shunt fitted): <10nA
Accuracy as for voltage ranges + shunt accuracy.
A-D Converter
Measurement resolutions supported:
19/20 bits at 9 measurements/s
18/19 bits at 20 measurements/s
17 bits at 30 measurements/s
15 bits at 80 measurements/s
14 bits at 100 measurements/s
A number of bits includes a sign counted as 1 bit.
50 Hz Mains frequency interference rejection is provided by 17 and 20-bit modes 60 Hz mains interference rejection is provided by 17,19 and 20-bit modes.
Higher Measurement rates possible by disabling drift correct measurements.
Interference Rejection
AC 50/60Hz
Common mode rejection ratio channel group: <0.1uV/V
Single-channel common-mode rejection ratio: <1uV/V
Series mode rejection ratio 50 or 60 Hz +/- 0.05%: <1uv/V
Note: reed scanners are not suitable for direct connection to power circuits.
Voltage Measuring Mode
Input voltage ranges:
+12V>-12V
+2,0V >-2.0V
+200mV >-200mV
+30mV >-30mV
Automatic range selection is supported.
Temperature coefficients DC voltage: 25ppm rdg + 0.1uV/o C
Measurement sensitivity 30mV range 18 bits: <0.25uV
Additional error at 80 & 100/sec mode 0.03% of range.
Overload Protection
Channel overload protection: Passive 50V Continuous
Isolation
For protection against transients and ground loops.
Isolation test voltage IMP to IMP or to SNET: Tested at 500V
Power Requirement
Connector: Via SNET cable
Voltage: 11 to 48V
Current: <100mA at 12V, <50mA at 24V
Thermocouple Measurement Accuracy
Internal Cold junction compensation errors included: (External compensation is also available)
| Type | Range | Accuracy |
|---|---|---|
| K | -100 to 500 | 0.05°C |
| 500 to 1200 | 0.7 | |
| J | 1200 to 1600 | 3.0 |
| 360 to 800 | 0.5 | |
| T | -150 to 400 | 0.7 |
| R | 0 to 1600 | 0.5 |
| S | 0 to 1700 | 2.0 |
| E | -50 to 290 | 2.2 |
| 290 to 1000 | 0.7 | |
| B | 200 to 1600 | 1.0 |
| N | -200 to 1600 | 4.5 |
| -100 to 580 | 1.1.5 | |
| 80 to 1300 | 1.3 |
Displayed sensitivity: <0.1oC
Thermocouple Health Monitoring automatic by resistance measurement sequence.
